2006-12-13 13:16:56 · 3 answers · asked by summer y 1 in Science & Mathematics ➔ Earth Sciences & Geology
Sedimentary rocks are the commonest examples of layered geological structures, and the orgin is easy to explain: As the name suggestions, it's sediment from rivers that sink to the bottom, usually in lakes and other river outfalls, which, over millenia, are metamorphized by heat and pressure into sedimentary rocks. In other words, solid morphed mud.
Other examples would include lava flows, igenous rock, alluvia, but the basic idea is the same: different materials get moved around and end up getting settled on top of each other, and heat and pressure takes care of the rest.
2006-12-13 13:25:44 · answer #1 · answered by Scythian1950 7 · 1⤊ 0⤋
its not just rocks, it's metals, rocks. The earth produces so much internal heat and pressure, the metals and rocks are compressed into layers.
2006-12-13 13:19:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I don't know anything
2015-06-08 13:14:29 · answer #3 · answered by Ryan 1 · 0⤊ 0⤋